Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 1 | #include "include/private/dvr/graphics/shader_program.h" |
| 2 | |
| 3 | #include <regex> |
| 4 | #include <sstream> |
| 5 | |
Alex Vakulenko | 4fe6058 | 2017-02-02 11:35:59 -0800 | [diff] [blame^] | 6 | #include <log/log.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 7 | |
| 8 | namespace { |
| 9 | |
| 10 | static bool CompileShader(GLuint shader, const std::string& shader_string) { |
Alex Vakulenko | 4fe6058 | 2017-02-02 11:35:59 -0800 | [diff] [blame^] | 11 | std::string prefix; |
| 12 | const std::string kVersion = "#version"; |
| 13 | if (shader_string.substr(0, kVersion.size()) != kVersion) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 14 | prefix = "#version 310 es\n"; |
| 15 | } |
| 16 | std::string string_with_prefix = prefix + shader_string; |
| 17 | const char* shader_str[] = {string_with_prefix.data()}; |
| 18 | glShaderSource(shader, 1, shader_str, nullptr); |
| 19 | glCompileShader(shader); |
| 20 | |
| 21 | GLint success; |
| 22 | glGetShaderiv(shader, GL_COMPILE_STATUS, &success); |
| 23 | if (!success) { |
| 24 | GLchar infoLog[512]; |
| 25 | glGetShaderInfoLog(shader, 512, nullptr, infoLog); |
Alex Vakulenko | 4fe6058 | 2017-02-02 11:35:59 -0800 | [diff] [blame^] | 26 | ALOGE("Shader Failed to compile: %s -- %s", *shader_str, infoLog); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 27 | return false; |
| 28 | } |
| 29 | return true; |
| 30 | } |
| 31 | |
| 32 | static bool LinkProgram(GLuint program, GLuint vertex_shader, |
| 33 | GLuint fragment_shader) { |
| 34 | glAttachShader(program, vertex_shader); |
| 35 | glAttachShader(program, fragment_shader); |
| 36 | glLinkProgram(program); |
| 37 | |
| 38 | // Check for linking errors |
| 39 | GLint success; |
| 40 | glGetProgramiv(program, GL_LINK_STATUS, &success); |
| 41 | if (!success) { |
| 42 | GLchar infoLog[512]; |
| 43 | glGetProgramInfoLog(program, 512, nullptr, infoLog); |
Alex Vakulenko | 4fe6058 | 2017-02-02 11:35:59 -0800 | [diff] [blame^] | 44 | ALOGE("Shader failed to link: %s", infoLog); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 45 | return false; |
| 46 | } |
| 47 | |
| 48 | return true; |
| 49 | } |
| 50 | |
| 51 | static bool LinkProgram(GLuint program, GLuint compute_shader) { |
| 52 | glAttachShader(program, compute_shader); |
| 53 | glLinkProgram(program); |
| 54 | |
| 55 | // Check for linking errors |
| 56 | GLint success; |
| 57 | glGetProgramiv(program, GL_LINK_STATUS, &success); |
| 58 | if (!success) { |
| 59 | GLchar infoLog[512]; |
| 60 | glGetProgramInfoLog(program, 512, nullptr, infoLog); |
Alex Vakulenko | 4fe6058 | 2017-02-02 11:35:59 -0800 | [diff] [blame^] | 61 | ALOGE("Shader failed to link: %s", infoLog); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 62 | return false; |
| 63 | } |
| 64 | |
| 65 | return true; |
| 66 | } |
| 67 | |
| 68 | } // anonymous namespace |
| 69 | |
| 70 | namespace android { |
| 71 | namespace dvr { |
| 72 | |
| 73 | ShaderProgram::ShaderProgram() : program_(0) {} |
| 74 | |
| 75 | ShaderProgram::ShaderProgram(const std::string& vertext_source, |
| 76 | const std::string& fragment_source) |
| 77 | : program_(0) { |
| 78 | Link(vertext_source, fragment_source); |
| 79 | } |
| 80 | |
| 81 | ShaderProgram::ShaderProgram(ShaderProgram&& to_move) { |
| 82 | std::swap(program_, to_move.program_); |
| 83 | } |
| 84 | |
| 85 | ShaderProgram::~ShaderProgram() { |
| 86 | if (program_) |
| 87 | glDeleteProgram(program_); |
| 88 | } |
| 89 | |
| 90 | ShaderProgram& ShaderProgram::operator=(ShaderProgram&& to_move) { |
| 91 | std::swap(program_, to_move.program_); |
| 92 | return *this; |
| 93 | } |
| 94 | |
| 95 | void ShaderProgram::Link(const std::string& vertext_source, |
| 96 | const std::string& fragment_source) { |
| 97 | if (program_) |
| 98 | glDeleteProgram(program_); |
| 99 | program_ = glCreateProgram(); |
| 100 | GLuint vertex_shader = glCreateShader(GL_VERTEX_SHADER); |
| 101 | GLuint fragment_shader = glCreateShader(GL_FRAGMENT_SHADER); |
| 102 | |
| 103 | bool success = CompileShader(vertex_shader, vertext_source) && |
| 104 | CompileShader(fragment_shader, fragment_source) && |
| 105 | LinkProgram(program_, vertex_shader, fragment_shader); |
| 106 | |
| 107 | glDeleteShader(vertex_shader); |
| 108 | glDeleteShader(fragment_shader); |
| 109 | |
| 110 | if (!success) { |
| 111 | glDeleteProgram(program_); |
| 112 | program_ = 0; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | void ShaderProgram::Link(const std::string& compute_source) { |
| 117 | if (program_) |
| 118 | glDeleteProgram(program_); |
| 119 | program_ = glCreateProgram(); |
| 120 | GLuint shader = glCreateShader(GL_COMPUTE_SHADER); |
| 121 | |
| 122 | bool success = |
| 123 | CompileShader(shader, compute_source) && LinkProgram(program_, shader); |
| 124 | |
| 125 | glDeleteShader(shader); |
| 126 | |
| 127 | if (!success) { |
| 128 | glDeleteProgram(program_); |
| 129 | program_ = 0; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | void ShaderProgram::Use() const { glUseProgram(program_); } |
| 134 | |
| 135 | std::string ComposeShader(const std::string& shader_code, |
| 136 | const std::vector<std::string>& variables) { |
| 137 | std::stringstream result_stream; |
| 138 | std::regex expression("%([0-9]*)"); |
| 139 | using reg_iter = std::regex_token_iterator<std::string::const_iterator>; |
| 140 | reg_iter rend; |
| 141 | // match the string and number (drop the %) |
| 142 | std::vector<int> submatches = {-1, 1}; |
| 143 | reg_iter reg(shader_code.begin(), shader_code.end(), expression, submatches); |
| 144 | bool is_even = true; |
| 145 | while (reg != rend) { |
| 146 | if (is_even) { |
| 147 | // even entries is the code between the %n's |
| 148 | result_stream << *reg; |
| 149 | } else { |
| 150 | // odd entries are the index into the passed in variables. |
| 151 | size_t i = static_cast<size_t>(std::stoi(*reg)); |
| 152 | if (i < variables.size()) { |
| 153 | result_stream << variables[i]; |
| 154 | } |
| 155 | } |
| 156 | is_even = !is_even; |
| 157 | ++reg; |
| 158 | } |
| 159 | return result_stream.str(); |
| 160 | } |
| 161 | |
| 162 | } // namespace dvr |
| 163 | } // namespace android |